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Finding the Fourth Proportional to 1,615.38, 2,423.52 and 628.49

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Solution

The fourth proportional to 1,615.38, 2,423.52 and 628.49 is: 942.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,615.38 : 2,423.52 = 628.49 : x
  2. Step 2: Convert to fraction form
    1,615.38/2,423.52 = 628.49/x
  3. Step 3: Cross multiply
    1,615.38x = 2,423.52 × 628.49
  4. Step 4: Simplify right side
    1,615.38x = 1,523,145.97
  5. Step 5: Solve for x
    x = 1,523,145.97/1,615.38
  6. Step 6: Final answer
    x = 942.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.